A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An eerie, derelict amusement park in Berlin.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

An unusual round church in London with a Templar past.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

The remains of Crystal Palace Great Exhibition of 1851.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

The curios of pharmacist and collector Henry Wellcome.

A brick foundation and piles of listing building materials are all that remains of this World War II POW camp.

This tangled English forest looks like something right out of a fairytale.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

A site of pagan worship which still attracts people looking for fairies.

A Scottish manor with a history of mysterious fires, magic, and eccentric tales